Suscripción a Biblioteca: Guest
Página principal de la Biblioteca Digital de ICHMT Año actual Archivos Comité Ejecutivo Centro Internacional de Transferencia de Calor y Masa

Multiscale simulation of energy transfer in concentrating solar collectors of solar power system

DOI: 10.1615/ICHMT.2015.IntSympAdvComputHeatTransf.1270
pages 1335-1337

Ya-Ling He
Key Laboratory of Thermo-fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China

Wen-Quan Tao
State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, China; Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xian Jiaotong University, Xian 710049, China


In this keynote lecture the multiscale simulation of heat transfer and fluid flow problems is presented in detail focusing on the simulation of heat transfer process in concentrating solar collectors (CSCs) of solar power system. Six sections are included.
In the first section the meaning of multiscale problems is briefly introduced. From numerical point of view the multiscale problems are divided into two categories: multiscale process and multiscale system; In the multiscale process different governing equations and different numerical methods should be used for different regions and numerical solutions should be coupled at the interface. A typical multiscale process is the mass and heat transfer in a PEMFC. For the multiscale system the same governing equation and the same numerical method are used at different regions. The cooling process by air stream in a large data center is a typical multiscale system. In the previous studies for the multiscale processes emphasis is manly concentrated on convective-diffusive heat transfer process. The focus of the present lecture will be put on the radiative-convective-diffusive process occurred in CSCs.
In the second part of the lecture introduction to four kinds of solar collector used in CSCs are presented. They are the parabolic trough solar collector (PTSC), the linear Fresnel reflector (LFR), the central receiver collector (CRC) and the solar dish collector (SDC). It can be seen that their common function is to collect the radiation from the sun, concentrate the solar energy and re-radiate the energy to a target where some kind of heat transfer surface is located to absorb the concentrated energy and transfers the energy to some working fluids. Especially, from the heat transfer point of view, the whole photo-thermal conversion process in all these receivers is a very complex coupled radiation-convection-conduction process where the heat source comes from the solar radiation carried by countless microcosmic photons (Fig.1).

ICHMT Digital Library

Bow shocks on a jet-like solid body shape. Thermal Sciences 2004, 2004. Pulsed, supersonic fuel jets - their characteristics and potential for improved diesel engine injection. PULSED, SUPERSONIC FUEL JETS - THEIR CHARACTERISTICS AND POTENTIAL FOR IMPROVED DIESEL ENGINE INJECTION
View of engine compartment components (left). Plots of temperature distributions in centreplane, forward of engine (right). CHT-04 - Advances in Computational Heat Transfer III, 2004. Devel... DEVELOPMENT AND CURRENT STATUS OF INDUSTRIAL THERMOFLUIDS CFD ANALYSIS
Pratt & Whitney's F-135 Joint Strike Fighter Engine under test in Florida is a 3600F class jet engine. TURBINE-09, 2009. Turbine airfoil leading edge stagnation aerodynamics and heat transfe... TURBINE AIRFOIL LEADING EDGE STAGNATION AERODYNAMICS AND HEAT TRANSFER - A REVIEW
Refractive index reconstructed field. (a) Second iteration. (b) Fourth iteration. Radiative Transfer - VI, 2010. Theoretical development for refractive index reconstruction from a radiative ... THEORETICAL DEVELOPMENT FOR REFRACTIVE INDEX RECONSTRUCTION FROM A RADIATIVE TRANSFER EQUATION-BASED ALGORITHM
Two inclusion test, four collimated sources. Radiative Transfer - VI, 2010. New developments in frequency domain optical tomography. Part II. Application with a L-BFGS associated to an inexa... NEW DEVELOPMENTS IN FREQUENCY DOMAIN OPTICAL TOMOGRAPHY. PART II. APPLICATION WITH A L-BFGS ASSOCIATED TO AN INEXACT LINE SEARCH